Jupiter’s Great Red Spot Continues Century-Long Shrink, Still Wider Than Earth

Jupiter’s Great Red Spot has been observed for about 190 years, shrinking from roughly 39,000 km to around 14,000 km across, though still wider than Earth; its long-term change is tracked annually by the Hubble Space Telescope, while shorter-term 90-day fluctuations occur; the reasons for the shrinkage are not settled and future changes could lead to the storm breaking up or stabilizing at a smaller size.